Acquisition of Businesses - Schedule of Recognized Assets Acquired and Liabilities Assumed (Details) $ in Thousands, CAD in Millions				3 Months Ended
	Mar. 11, 2016 USD ($)	Jan. 04, 2016 USD ($)	Jan. 04, 2016 CAD	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Excess purchase price over fair value of net assets acquired (“goodwill”)				$ 189,266		$ 185,223
Purchase price, net of cash acquired				$ 57,766	$ (279)
Maligne Tours Ltd
Business Acquisition [Line Items]
Cash		$ 14,962	CAD 20.9
Inventories		246
Prepaid expenses		2
Property and equipment		4,133
Intangible assets		9,244
Total assets acquired		13,625
Customer deposits		15
Total liabilities assumed		15
Total fair value of net assets acquired		13,610
Excess purchase price over fair value of net assets acquired (“goodwill”)		$ 1,352
CIRI Alaska Tourism Corporation
Business Acquisition [Line Items]
Cash	$ 45,000
Estimated working capital adjustment	54
Accounts receivable	8
Inventories	921
Prepaid expenses	82
Property and equipment	43,470
Intangible assets	980
Total assets acquired	45,461
Accounts payable	201
Accrued liabilities	450
Customer deposits	1,952
Total liabilities assumed	2,603
Total fair value of net assets acquired	42,858
Cash acquired	(2,196)
Purchase price, net of cash acquired	$ 42,858